Presuming your friends use Foursquare, of course.
Prepare for the (online) land grab.
The mailing system was born 50 years ago this week. Here's how the Post Office sold it to the country.
Where people Tweet in San Francisco, New York City, and Istanbul.
The massive new project threatens to leave much of Egypt without water.
Cataloging the fruits, nuts, and herbs hidden in the sidewalk foliage.
This world-changing invention is more expensive than we remembered.
Satellite images of vegetation can help to forecast droughts and fires and even diseases.
Here's one way to activate public space at night.
This "Wearable Solar" clothing allegedly can restore half of a phone's power when worn in bright sunlight.
Even when they know they're not.
Easy-to-use tools to cut through bureaucratic red tape, via the Knight News Challenge.
New Yorkers can mount this thing on their heads and never worry about finding a Citi Bike dock again.
Soon, the FAA will let you use your iPad even during takeoffs and landings.
Yelp's effort to publish restaurant health safety inspections is just the second time cities have attempted to communicate valuable information in a common language.
For hiking trails and other locations beyond the reach of cars.
How "tactile displays" could help lead to less distracted driving and transform the way we navigate.
At least, that's not what's going on in this widely circulated photo of a sinkhole filled with bright green ooze.